That's my secret, Captain. I'm always angry.
— Bruce Banner Hulk (Mark Ruffalo)
8 seconds sound clip from the The Avengers (2012) movie soundboard.
You can hear this line at 01:51:35 in the Blu-ray version of the movie.
Quote context
[...]
- I'm bringing the party to you.
- I don't see how that's a party.
- Now might be a really good time for you to get angry.
- That's my secret, Captain. I'm always angry.
- Hold on!
- Guys.
[...]